diff --git a/po/sk.po b/po/sk.po
index 954294c3c7..06ded70876 100644
--- a/po/sk.po
+++ b/po/sk.po
@@ -2318,7 +2318,7 @@ msgstr "Nie nezáporné číslo"
 #: libraries/config/FormDisplay.class.php:85
 #: libraries/config/validate.lib.php:409
 msgid "Not a valid port number"
-msgstr ""
+msgstr "Neplatné číslo portu"
 
 #: libraries/config/FormDisplay.class.php:86
 #: libraries/config/FormDisplay.class.php:574